/* 首屏Banner区域 */
.a-banner {
    width: 100%;
    min-height: 1134px;
    background: url(../img/a_banner.png) center / cover no-repeat;
    display: flex;
    flex-direction: column;
    align-items: center;
    /* justify-content: center; */
    text-align: center;
    position: relative;
    margin-top: 80px;
    /* padding-top: 583px; */
    padding-bottom: 50px;
}
.a-banner-txt {
    width: 1000px;
    margin-top: 465px;
}
.a-banner .tag {
    background: linear-gradient(90deg, #6a4c93, #9c27b0);
    padding: 6px 20px;
    border-radius: 4px;
    font-size: 16px;
    margin-bottom: 10px;
}

.a-banner h1 {
    font-size: 42px;
    font-weight: bold;
    margin-bottom: 8px;
    letter-spacing: 2px;
}

.a-banner .subtitle {
    font-size: 16px;
    margin-bottom: 10px;
    opacity: 0.9;
}

.a-banner .features {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
    font-size: 14px;
    opacity: 0.7;
}

.download-btn {
    background: linear-gradient(90deg, #5cf7ff, #12f3ff);
    color: #131517;
    border: none;
    /* padding: 12px 40px; */
    border-radius: 50px;
    font-size: 30px;
    font-weight: bold;
    cursor: pointer;
    width: 400px;
    height: 80px;
    display: flex;
    align-items: center;
    margin-top: 77px;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s ease-in-out;
}
.download-btn i {
    color: #131517;
    font-size: 30px;
    margin-top: 10px;
}
.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(77, 208, 225, 0.4);
}

/* 技术升级区域 */
.tech-section {
    /* padding: 60px 20px; */
    text-align: center;
    background: #12141b;
    overflow: hidden;
}

.tech-section h2 {
    font-size: 24px;
    margin-bottom: 40px;
    font-weight: 500;
    background: #12141b;
}

.tech-content {
    width: 100%;
    min-height: 599px;
    background: url(../img/a_bg2.png) center / cover no-repeat;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    margin-top: 48px;
}
.tech-section-title {
    font-size: 48px;
    color: #c9f4ff;
    text-align: center;
    margin-top: 71px;
}

.tech-list {
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-left: -600px;
    margin-top: -86px;
}

.tech-item {
    background: linear-gradient(180deg, #262a3a, #12141b);
    padding: 21px 27px;
    font-size: 14px;
    opacity: 0.6;
    color: #c9f4ff;
    width: 400px;
    border-radius: 8px;
}

.tech-item.active {
    background: rgba(128, 176, 255, 0.15);
    border: 1px solid #5cf7ff45;
    opacity: 1;
}
.tech-item.active .title {
    color: #12f3ff;
}
.tech-item .title {
    font-weight: bold;
    font-size: 20px;
    color: #c9f4ff;
    margin-bottom: 7px;
}

.rocket-icon {
    width: 200px;
    height: 200px;
    background: url("https://picsum.photos/id/2/200/200") center/contain no-repeat;
    position: relative;
}

.rocket-icon::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    border: 2px solid #4dd0e1;
    border-radius: 50%;
    opacity: 0.6;
    animation: rotate 8s linear infinite;
}

@keyframes rotate {
    from {
        transform: translate(-50%, -50%) rotate(0deg);
    }
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* 游戏免费区域 */
.game-section {
    text-align: center;
    background: url(../img/a_bg.png) center / cover no-repeat;
    height: 740px;
    overflow: hidden;
}

.game-section h2 {
    font-size: 24px;
    margin-bottom: 30px;
    font-weight: 500;
}

.game-tags {
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: center;
}

.game-tag {
    background: rgba(77, 208, 225, 0.1);
    border: 1px solid #4dd0e1;
    padding: 22px 20px;
    border-radius: 4px;
    font-size: 30px;
    position: relative;
    /* max-width: 600px; */
    width: 726px;
    color: #fff;
}
.game-tag1 {
    background: url(../img/k2.png) center / cover no-repeat;
}
.game-tag2 {
    background: url(../img/k1.png) center / cover no-repeat;
}
.game-tag3 {
    background: url(../img/k2.png) center / cover no-repeat;
}


/* UI展示区域 */
.ui-section {
    padding: 60px 20px;
    text-align: center;
    background: #12141b;
}

.ui-section h2 {
    font-size: 24px;
    margin-bottom: 30px;
    font-weight: 500;
}

.ui-demo {
    margin-top: 50px;
}
.ui-demo img {
    width: 1000px;
}
.a-download-btn {
    cursor: pointer;
    width: 500px;
    height: 80px;
    line-height: 80px;
    font-size: 30px;
    text-align: center;
    color: #ffffff;
    background: linear-gradient(90deg, #53a3ff 5%, #ff26ef, #005cff);
    border-radius: 40px;
    margin: 30px auto;
    transition: all 0.3s ease-in-out;
}
.a-download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(195, 77, 225, 0.4);
}
.a-download-btn i {
    font-size: 30px;
    color: #fff;
}
.a-download-btn span {
    margin-left: 10px;
}